Angular Dependence of Transport AC Losses in Superconducting Wire with Position-Dependent Critical Current Density in a DC Magnetic Field

作者：Su Xing liang; Xiong Li ting; Gao Yuan wen^*; Zhou You he

来源：Journal of Low Temperature Physics, 2013, 172(1-2): 154-161.

DOI：10.1007/s10909-013-0856-z

• Angular dependence
• Transport AC losses
• Inhomogeneous critical current density
• DC applied magnetic field

Transport AC losses play a very important role in high temperature superconductors (HTSs), which usually carry AC transport current under applied magnetic field in typical application-like conditions. In this paper, we propose the analytical formula for transport AC losses in HTS wire by considering critical current density of both inhomogeneous and anisotropic field dependent. The angular dependence of critical current density is described by effective mass theory, and the HTS wire has inhomogeneous distribution cross-section of critical current density. We calculate the angular dependence of normalized AC losses under different DC applied magnetic fields. The numerical results of this formula agree well with the experiment data and are better than the results of Norris formula. This analytical formula can explain the deviation of experimental transport current losses from the Norris formula and apply to calculate transport AC losses in realistic practical condition.

• 出版日期2013-7
• 单位兰州大学